JPH09117118A - Induction motor and stator manufacturing method - Google Patents

Abstract

(57) [Abstract] [Purpose] Manufacturing method of metal powder injection molding sintered alloy without machining (generally MIM [Metal Injection Mol
d)), a yoke member is manufactured to provide a stator member that is low cost and easy to manufacture. [Structure] A stator that generates a rotating magnetic field and a rotor that is an iron-based disk (IRON-DISK) that acts on the rotating magnetic field from the stator are provided, and the rotor is rotated by a support means different from the stator. It is supported as much as possible and can be assembled freely from the stator.
The stator is formed by winding a coil around a stator member manufactured by a metal powder injection molding sintered alloy method.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an IRON-DISK type induction motor and a stator manufacturing method of an IRON-DISK type induction motor, in which a stator winding yoke member is manufactured by a metal powder injection molding alloy method. The present invention is characterized in that a necessary winding is formed on the yoke to form a stator, and an object thereof is to provide a low-cost yoke applicable to general motors.

[0002]

2. Description of the Related Art A conventional stator member of an AC motor has a high frequency characteristic, that is, an iron-based material having a high magnetic permeability μ and a high magnetic flux density B (for example, silicon steel plate, permendur,
(Permalloy etc.) was machined and laminated into the required shape by machining, and the yoke part of the stator winding was insulated and laminated to manufacture the stator. It is also a factor of high cost.

Further, it has been difficult to manufacture a yoke member having a three-dimensionally complicated shape. For this reason, regarding the manufacturing method of the yoke member, there has been a problem to significantly shorten the machining process or to develop a manufacturing method that does not require machining.

The object of the present invention is to solve the above-mentioned drawbacks, and a method for producing a metal powder injection molded sintered alloy (generally MI.
M [Metal Injection Mold]) to manufacture a yoke member to provide a low cost and easily manufactured stator member.

[0005]

The present invention has been made to solve the above-mentioned conventional problems, and in the iron-disk induction motor according to claim 1 of the present invention, a stationary magnetic field is generated. It is equipped with a rotor and a rotor made of an iron-based disk (IRON-DISK) on which a rotating magnetic field acts from the stator, and the rotor is rotatably supported by a support means different from the stator and can be separated from the stator. The stator is constructed by winding a coil around a stator member manufactured by a metal powder injection molding sintered alloy method.

In the stator manufacturing method according to the second aspect of the present invention, the yoke member is formed in a comb shape (A) having a cross section H,
(B) forming and annealing step, and the comb-shaped yoke member
(A) and (B) are integrated by interlocking the comb portions with an insulating adhesive, a step of grinding both end surfaces of the integrated yoke to insulate each comb portion, and the insulated lamination It is manufactured by a step of winding a coil around a yoke and a step of radially disposing and fixing a plurality of laminated yokes around which the coil is wound on a stator base.

In the stator manufacturing method according to claim 3 of the present invention, the step of integrally forming and annealing the stator base and the comb-shaped yoke members (A1), (B1) radially arranged, and the comb-shaped -Shaped yoke members (A1) and (B1) are integrated by insulatively engaging the comb parts with an insulating adhesive; a step of grinding both end faces of the integrated yoke to insulate each comb part; And a step of winding a coil around each coil groove 11 of the laminated yoke.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.
Referring to the accompanying drawings, FIG. 1 shows a structure of a stator member-integrated induction motor according to an embodiment of the present invention, and FIG. 2 shows a structure of a stator member-separated induction motor according to an embodiment of the present invention. FIG. 3 is a diagram for explaining a stator manufacturing method according to an embodiment of the present invention, and FIG. 4 is a diagram for explaining a stator manufacturing method according to another embodiment of the present invention.
FIG. 5 shows an example of the temperature profile of magnetic annealing.

As the material used in the present invention, a metal powder having a high magnetic permeability μ and a high magnetic flux density B is used, and a method for producing a metal powder injection molded sintered alloy (generally MIM [Metal Injection Mold]) is used.
In, the yoke member was manufactured. The shape of the yoke member can be freely designed by using a molding die, and a three-dimensional complicated shape can be obtained by using the metal powder injection molding sintered alloy method.

Table 1 shows the material composition and the magnetic properties obtained after sintering. From the results shown in Table 1, the high frequency characteristics required for the stator were sufficiently satisfied.

[0011]

[Table 1]

Next, as shown in FIGS. 1 and 2, the stator was assembled. FIG. 1 shows a stator member integrated type,
Each stator member 2 is wound with a coil 3, and the IRON-ROTOR
The shaft 4 fixed to No. 1 was inserted into the stator bearing 5, and the bearing 5 held the shaft 4. Although FIG. 1 shows an example of 4 poles and 8 poles, the number of poles can be freely designed according to the required characteristics of the stator.

FIG. 2 shows an example in which the stator member is separated and four poles and eight poles are shown as in FIG. 1, but the number of poles can be freely changed as required. Also, the stator base 6
Was conducted at Permalloy.

Although a disk type is shown in FIGS. 1 and 2, it can be applied to a general motor by using a stator member obtained by a metal powder injection molding and sintering alloy method with a winding and using it as a stator. Is.

FIG. 5 shows an example of the temperature profile of magnetic annealing. Depending on the material composition ratio and the constituent materials,
The conditions change.

Next, a method of manufacturing the stator according to the present invention will be described with reference to FIG. First, the yoke member is sectioned H
Molded into comb shape A and B, and annealed. Next, the comb-shaped yoke members A and B are made into an integral structure C by engaging the comb portions with an insulating adhesive, and both end surfaces M1 and M2 of the integrated yoke C are ground to insulate the comb portions and laminated yokes. D was produced.
A coil is wound around the coil groove 10 of the insulated laminated yoke D, and a plurality of laminated yokes D around which the coils are wound are radially arranged and fixed to the stator base to obtain the stator of the present invention.

Since the thin plate is manufactured in this manner, unlike the general method of manufacturing a laminated yoke member, since the thin plate is integrated in a comb shape in the bonding step, the positioning accuracy is improved and the laminated yoke member is easily manufactured. Can be manufactured.

Next, a method of manufacturing a stator according to the second embodiment of the present invention will be described with reference to FIG. First, the stator base and the comb-shaped yoke member A radially arranged.
1, B1 is formed and annealed. Next, the comb-shaped yoke members A1 and B1 integrally formed with this stator base are engaged with the comb portion by an insulating adhesive to form an integrated structure C1, and both end surfaces N1 and N2 of the integrated yoke C1 are ground. A laminated stator D1 was manufactured by insulating the comb portion. The stator of the present invention was obtained by winding the coils around the plurality of coil grooves 11 of the insulated laminated stator D1.

Since the stator is manufactured in this manner, the stator having the laminated yoke can be easily manufactured at low cost.

[0020]

According to the present invention, as described in detail in the embodiment, in the manufacturing method of the stator member, the final shape of the slot member is manufactured by the injection molding method which does not require the machining of the lamination, so that the mass production is possible. Productivity is improved and it can be produced at low cost. Also, what has occurred in machining methods such as dimensional defects,
Since it is injection molding, the defect occurrence rate is drastically reduced and the yield is improved. Further, it is possible to manufacture a three-dimensionally complicated shape.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a structure of an induction motor integrated with a stator member according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the structure of a stator member separation type induction motor of one embodiment of the present invention.

FIG. 3 is a diagram illustrating a method of manufacturing a stator according to an embodiment of the present invention.

FIG. 4 is a diagram illustrating a method of manufacturing the stator according to the second embodiment of the present invention.

FIG. 5 is a graph showing an example of a temperature profile of magnetic annealing.

[Explanation of symbols]

 1 IRON-ROTOR 2 Stator 3 Coil 4 Shaft 5 Bearing 6 Stator stand 10, 11 Coil groove

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuo Sekiya 3-8-22 Nitta, Adachi-ku, Tokyo Namiki Seimitsu Takara Stone Co., Ltd.

Claims (3)

[Claims] 1. A stator provided with a rotating magnetic field, and a rotor composed of an iron-based disk (IRON-DISK) on which the rotating magnetic field acts, the rotor being provided with a supporting means different from the stator. IRON-DISK type characterized in that it is rotatably supported by and is detachably assembled from the stator, and the stator is formed by winding a coil around a stator member manufactured by a metal powder injection molding sintered alloy method. induction motor. 2. A step of forming and annealing a plurality of yoke members in a comb shape having an H-shaped cross section, and a step of interlocking a pair of the plurality of comb-shaped yoke members with an insulating adhesive to integrate them. A step of grinding both end surfaces of the integrated yoke to insulate each comb portion; a step of winding a coil around the insulated laminated yoke; and a step of winding a plurality of laminated yokes around which the coil is wound into a stator. And a step of radially arranging and fixing it on a stand. 3. A step of integrally molding a plurality of comb-shaped yoke members radially arranged with a stator base and annealing, and integrally forming a pair of the plurality of comb-shaped yoke members with an insulating adhesive to interlock the comb portions. The step of grinding the both ends of the integrated yoke to insulate each comb portion, and the step of winding a coil in each coil groove of the insulated laminated yoke. Characteristic stator manufacturing method.